How to single sign on services work?

Question

If I have 10 websites, how can I create a single-sign-on such that if they login to any of the 10 websites, going to the other websites automatically detects they are logged in and logs them in.

How is this done? You can't share cookies between domains, so how can you detect if the user logged into any of the 10 sites?

here's a SO question on cross-domain cookie sharing: http://stackoverflow.com/q/263010/366493 — csturtz, Feb 22 '12 at 19:01

score 0 · Answer 1 · edited May 23 '17 at 12:14

0

Use more verbose cookie setting method

Rails: how can I share permanent cookies across multiple subdomains?

edited May 23 '17 at 12:14

Community

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answered Feb 22 '12 at 18:57

Andre Dublin

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I don't believe the question limited the application to subdomains. – courtsimas Nov 19 '14 at 15:29

score -2 · Answer 2 · answered Feb 22 '12 at 19:01

-2

See the List of single sign-on implementations here: http://en.wikipedia.org/wiki/List_of_single_sign-on_implementations

answered Feb 22 '12 at 19:01

Ruslan Ulanov

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That describes concepts but doesn't help with implementation. – courtsimas Nov 19 '14 at 15:30
The technical implementation will depend on SSO technology chosen. The original question is not specific enough to provide technical details. – Ruslan Ulanov Nov 20 '14 at 22:01

How to single sign on services work?

2 Answers2